Service manual

10
(2) Other case
3
blinking
5,7,10
blinking
6
blinking
9
blinking
Freezing protection is
working.
1) Short cycle of air cycle
2) Dirty air filter
3) Damaged fan
4) Abnormal refrigerant
1) Clear obstructions from air cycle.
2) Clean the air filter
3) Check the fan
4) Check the refrigerant temperature.
Malfunction of outdoor unit Malfunction of outdoor unit Refer to the TECHNICAL & SERVICE MANUAL
of outdoor unit.
Malfunction of drain pump 1) Malfunction of drain pump
2) Damaged drain sensor
1) Check the drain pump.
2) Check the drain sensor.
(Check the drop of water is on.)
If the resistance is normal, replace the indoor
controller board.
Outdoor thermistor Mis-connecting of the outdoor
thermistor.
Reinsert the connector.
Trouble of the outdoor thermistor.
Trouble of the outdoor inverter P.C.
board.
Exchange the outdoor inverter P.C. board.
Check the resistance value of the thermistor.
Phenomenon
Blinking
frequency
Cause Countermeasure
Not working of remote
controller switch ON/OFF
Short circuit the protecting parts in the
Indoor controller board.
Trouble of the Indoor controller board. Check the Indoor controller board out.
Trouble of the remote controller.
Check the varistor (ZNR1) and fuse (FUSE) out in
the Indoor controller board.
Exchange the remote controller.
Wiring between the indoor and outdoor is
coming off.
Working the Indoor units
and not working the outdoor
units.
Check the wiring out between the indoor and
outdoor.
Difference of wiring polarity between the
indoor and outdoor.
Trouble of the outdoor inverter P.C. board.
Trouble of the contactor (52C). Exchange the contactor.
Check the outdoor inverter P.C. board.
Malfunction of outdoor unit. Refer to the TECHNICAL & SERVICE MANUAL of
outdoor unit.
Fan motor connector is coming off.
Not rotating the fan in the
indoor unit.
Trouble of the Indoor controller board.
Check the fan motor output of the Indoor controller
board.
Check the connector out.
Trouble of the fan motor. Check the resistance value between the each tap
of fan motor.
A connector attaching the panel to the body
is not connected.
Horizontal vane doesn't work.
Check if the connector for vane motor is connected.
Connect it.
A connector attaching the panel to the body
is not connected.
Fixing of horizontal vane.
Connect it.
Phenomenon Cause Countermeasure
From the preceding page.
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